GeForce GTX 285 2GB vs GeForce GTX 650

Intro

Compare all of that to the GeForce GTX 650, which comes with a core clock frequency of 1058 MHz and a GDDR5 memory speed of 1250 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It is comprised of 384 SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 140 Watts (219%)

Memory Bandwidth

The GeForce GTX 285 2GB, in theory, should perform a lot faster than the GeForce GTX 650 overall. (explain)

GeForce GTX 285 2GB		158976 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 78976 (99%)

Texel Rate

The GeForce GTX 285 2GB will be a lot (more or less 53%) more effective at anisotropic filtering than the GeForce GTX 650. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 17984 (53%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 285 2GB is the winner, by far. (explain)

GeForce GTX 285 2GB		20736 Mpixels/sec
GeForce GTX 650		16928 Mpixels/sec
	Difference: 3808 (22%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the interface width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.